Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Net revenue	$ 231,115	$ 186,678	$ 448,456	$ 352,780
Costs of revenue	146,506	108,629	274,685	200,005
Gross profit	84,609	78,049	173,771	152,775
Operating expenses:
Compensation and benefits	126,788	97,868	274,547	198,216
Technology	13,154	13,154	27,744	24,538
Professional services	4,873	5,794	10,310	10,564
Occupancy	1,057	1,148	2,211	2,263
Depreciation and amortization	2,494	921	4,474	1,900
Marketing and advertising	561	886	1,002	1,445
Other operating expenses	5,103	4,995	10,336	9,838
Total operating expenses	154,030	124,766	330,624	248,764
Loss from operations	(69,421)	(46,717)	(156,853)	(95,989)
Other income (expense), net	10,762	1,802	22,434	(9,875)
Loss before income tax expense	(58,659)	(44,915)	(134,419)	(105,864)
Income tax expense (benefit)	138	(227)	(6,821)	(578)
Net loss	(58,797)	(44,688)	(127,598)	(105,286)
Other comprehensive income (loss), net of taxes:
Change in foreign currency translation adjustment	100	(181)	119	(200)
Net change in unrealized gain (loss) on short-term investments	1,607	(1,896)	5,642	(7,763)
Net other comprehensive income (loss)	1,707	(2,077)	5,761	(7,963)
Comprehensive loss	$ (57,090)	$ (46,765)	$ (121,837)	$ (113,249)
Net loss per share attributable to common stockholders, basic (in dollars per share)	$ (0.11)	$ (0.08)	$ (0.24)	$ (0.19)
Net loss per share attributable to common stockholders, diluted (in dollars per share)	$ (0.11)	$ (0.08)	$ (0.24)	$ (0.19)
Weighted-average shares used in computing net loss per share attributable to common stockholders - basic (in shares)	538,267,449	544,704,146	538,988,940	543,524,008
Weighted-average shares used in computing net loss per share attributable to common stockholders - diluted (in shares)	538,267,449	544,704,146	538,988,940	543,524,008